Apart from the requirement to reach 100K EHP, there is very little said about required skills in both the fitting page and the rookie guide.
So when the FC called upon us to overheat our guns, it took me a while to figure out that I needed thermodynamics in order to do so.
I'm also going batshit crazy on Capacitor and Navigation skills, as I never seem to have enough to keep my MWD going while we slowboat to the next position.
I kind of wish I'd had those before I started. So mentioning that in one of the guides might help other newcomers. Feel free to add more skill suggestions if you'd happen to have any.